Cylindrical valve for locomotives



' 1,632,629 June 14 1927 E. M. SHANNON I v CYLINDRICAL VALVE FOR LOCOMOTIVES Filed July 5. i924 2 sheets-sheet 2 Patented June 14, 1.927.

ELLWOOD M. SHANNON, BALA, PENNSYLVANIA, ASSIGNOR TOTHE BALDWIN LOYCO- ivro'rIvE` wenns, orl PHILADELBHIA, PEivnsYLvaNiA,

SYLVANIA.

Application filed July 5,

f My invention relates ,to certain improvements vin cylindrical valves used in connection with locomotivey cylinders of the type having inlet ports and passages separate from the exhaestports wdressases- -Y The defect of ,the ,nvertorl '1S t0 111.2212@ the ,valve .of a Series Of sections which are coupled together by a rod that extends through the sections of the valve and'to 'provide packing rings at the junction of the i @vereiste-sticas..

In the accompanying drawings: Fig. 1 is a sectional elevation of a sui'iicient portion of a cylinder and valve chest of a locomotive to illustrate my improved cylindrical valve; 4

Fig. 2 is an enlarged longitudinal sectional view of the valve;

Fig. 3 isan end view; Fig. 4 is a sectional view on Fg- 2; z Fig. 5 is a sectional view on the line 5-5,

Fig. 2; and l l Fig. 6 is an enlarged sectional view of a portion of'Fig. 2, showing the detail construction of the packing rings.

Referring to the drawings, 1 is the cylinder of a locomotive having -heads 2 and 3. Within the cylinder is a piston 4 having a rod 5 that extends from a stuiiing box in the head 2. Cast integral with the cylinder, in the present instance, is a valve chest 6, which is cylindrical in cross section. Fitting in the valve chest is a cylindrical valve 7.1 The valve `chest has cylindrical bushings 8, which extend from each end to a point near the center. 'The bushings are separated to allow the exhaustpassage 9 to comthe line 4 4,

municate with the interior of the valvel chest. i

At each side of the central exhaust passage 9 are exhaust passages 10,l which communivcate with the cylinder at a point `between the center of the cylinder and each end thereof and with the valve chest on each side of the exhaust passage 9. Communicating with each end of the cylinder are inlet passages 11 for live steam, which also communicate withthe valve chest some distance from the exhaust passages 10. Surrounding the .valve Vchest at each end thereof beyond the inlet passage 11 is' a steam supply passage 12. The two passages communicate with a cen- I CYLINDRVIGAL VALVE FOR LOCMOTIVES.

1,9124. semi N9. 724,464. y

trai `stema-n.1 supply communicates with the steam pipe leading from the boiler .or the superheater..

' .T119 lPShngs 8 are perforated at the several ports for the flow of livestearn and the exhaust steam. AThe ends. of the 4valve chest'are closed y.by heads`14 15.

The' valve' rod 16 extends through the head A CORPORATION or" yPaimf passagel, which, in turn, v

14, 4shown clearly Fig. 1. The valve' 7 has "three annular jeter-11e. Spaces' .17, 18

i195 weicher@ Separated .by blank sc- 'tions 2O and 21.' The two spaces `17 and 18 are for the passage of live steam from the steam passages12 to the passages 11 lea-ding to the cylinder. The space 19 is `for the passage of exhaust steam from the passages 10 to the central exhaust passage 9. The valve 7 consists of a series of sections that are secured together by the valve rod16, which extends entirely through the valve, as shown clearly in Fig. 2.

The sections 20 and 21 of the valve-each have a central portion 22 and depressed flanges 23 at each side. Each section has a central hub 24, which is connected to the central portion 22 by webs 25. The rod 16 has its bearing in the hub 24. At the respective ends of the valve are'spiders, each of which comprises an annular hub 26. The valve-rod extends through the two hubs.

Rings 28 correspond to the side flanges of the sections 2O and 21. Between the sections 20 and 21 is a cylindrical spacer section 29,

which is less in diameter at the center than at the ends, Awhich forms the .exhaust steam space 19. This section is made preferably of boiler steel flanged to the form shown in Fig. 2.' It is notched at 30 to receive the ends of the flanges 28 of the sections 20 and 21. Between the cylindrical section 29 and the sections 2() and 21 are retaining rings 81, shaped as shown in the drawings. Each of the rings 31 has a wide base which contacts directly with the. spacer section 29 and the corresponding valve section, and each of the rings has undercut recesses at opposite sides thereof adapted to receive snap-rings, as hereinafter set forth. The shape of the rings 31 may vary depending upon the type of packing employed.

The cylindrical spacing sections 32, which are shaped to form the annular steam spaces 17 and 18, are made similar to the section 29 and are notched at 33 to receive the ends ot the flanges 23 of the sections 20 and 2l and the fianged portion ot the rings 28.

Between the sections 32 and the sections 2() and 2l are retaining rings 34. Between the sections 32 and the end rings 28 are retaining rings 35. The rings 34 and 35 are similar to the rings 3l already described.

The rod 16 has a shoulder 36 against which the hub of the forward spider rests and the opposite end of the rod is used for the reception of a nut 3T. On tightening this nut, the sections ot the valve are drawn close together, as shown in Fig. 2.

In order to lock the sections 2O and 21 and the end hubs 26 to the rod 16, keys are provided, as shown in the drawings.

In the present instance, the packing rings between the several sections are made as shown in Fig. 6. The central ring 35 has an extended base, which lits the recess between the two sections. On each side of this central ring are snap rings 40, which fit the undercut recesses of the ring The ring 35 is secured against. rotation by means of a 2 threaded screw 42, and the rings 40 are coupled to the central ring 35 by a dowel pin 4l.

I claim:

The combination in a cylindrical valve, ol a valve rod, two pairs ot spiders, the spiders o each pair comprising an outer ring and a central hub; packing rings mounted on the outer rings; a' central cylindrical section located between the intermediate spiders; two 3 cylindrical Iend sections between the said intermediate spiders and the end spiders, said cylindrical end Sections being less in length than the central section; and means on the rod for clamping the series of parts together, 4 said cylindrical sections and spiders forming a valve having a. central passage therein extending from one end oi the valve to the other.

ELLWOOD M. SHANNON. 

